HCDA HNTD HCDA-HNTD 8-day TP network foundation; VRP foundation; Basic principles of Ethernet technology, WAN technology, routing protocol, network security and network management and their implementation in Huawei products; HCDP IERN HCDP-IERN 6-day OSPF protocol, BGP protocol, routing selection and control, multicast member discovery protocol, multicast routing protocol, principle, configuration and its application in industrial networks; Product introduction and application of enterprise network router IESN HCDP-IESN 5-day VLAN, QinQ, 802. 1X, MPLS, LDP and other technical principles, configurations and their applications in enterprise networks; Introduction and application of industry network products IENP HCDP-IENP 4-day network security product introduction; Network security configuration; HA, Qos technology principle, configuration and its application in enterprise network HCDP HCDP- fast HCDP- fast 5-day advanced routing protocol function, Huawei free switching function, network security configuration, HA, QoS technology principle.